Skip to main content

What is TVS Diodes: - Types, Working and Advantages & Disadvantages


TVS Diodes
Transient voltage suppressor diodes, more commonly referred to as TVS diodes are wont to protect integrated circuits (ICs). TVS diodes ensure semiconductors and delicate parts against high transient voltage spikes (overvoltage).
TVS diodes are offered in both through-hole and surface mount bundles. They can be unidirectional or bidirectional. Unidirectional TVS diodes will only allow positive or negative voltage whereas bidirectional diodes can operate at both positive and negative voltages.
TVS diodes are able to conduct large currents to the ground due to their construction. They feature a way larger p-n junction cross-sectional area than standard diodes.

Types of TVS Diode
Transient Voltage Suppressor Diodes can be grouped into two kinds. One is Unidirectional, and the other is Bidirectional.
A unidirectional Transient Voltage Suppressor Diode fills in as a rectifier in a circuit the forward way like some other avalanche diode, and this unidirectional diode is made to withstand very large peak currents.
On the opposite hand, a bidirectional transient-voltage-suppression diode will be represented by two mutually opposing avalanche diodes connected series with each other. Unlike the symbol, these diodes are manufactured as one component.

How to use TVS Diodes
TVS Diodes are connected in parallel with the device or circuit to be protected. The TVS device is specifically designed to breakdown at a particular voltage level and conducts large amounts of current without sustaining damage.
In the normal voltage conditions, TVS diode appears as a circuit, but a little leakage current is present. When the traditional voltage exceed to a particular level, the TVS diode junction avalanches and as the result overvoltage is diverted from the protected circuit and shunted through the TVS diode. The device automatically resets when the overvoltage goes away.

TVS Diode Parameters
There are many types of TVS diode in the market, designed for a specific application. When you are selecting a TVS Diode you can look for the following terminologies in the datasheet to suit your design.
Reverse Stand-Off Voltage (VR): Reverse stand-off voltage is the maximum voltage that can be applied to the protector without actually activating the device. The device VR should be equal to, or higher than the peak operating voltage of the circuit being protected. This is to make sure that the protection device doesn't clip the traditional circuit operating or signal voltage.
Breakdown Voltage (VBR): Breakdown voltage is that the voltage at which the diode will begin to guard and conduct current. Generally, the VBR is specified at 1mA.
Clamping Voltage (VC): Clamping Voltage is the highest voltage that the protected circuit will be exposed to during the test waveform event. On most datasheets, the clamping voltage is given for a 1A or 2A waveform that has an 8µS rise time.
Peak Pulse Current (IPP): The peak pulse current is the maximum current the protection device can withstand.

Advantages
  • Fast acting
  • Simple to utilize
  • Readily available
  • Bidirectional or unidirectional
  • Calibrated low clamping voltage
  • Fails short-circuited

Disadvantages
  • High capacitance limits frequency
  • Low energy handling
  • More costly than Zener diodes, or MOVs


Labels:

Comments

Post a Comment

Popular posts from this blog

Different types of Limit Switches

Rotary Geared Limit Switches The operating of the Limit Switch is to prevent the mechanism or drive at the intense forward/reverse positions. The Limit Switches are significantly suited to use on reversing drives like a hoist, winches, rolling mills and various other mechanisms used in steel plants such as coke ovens, feeding machinery, valve drives etc. The contacts of Limit Switches are forty amps rated ceaselessly at 500 Volts A. C. The Limit switch is often supplied with two NC contacts or four NC contacts or (2 NO + two NC) contacts as per the need. For Series Limit Switches are shields are provided. The frequency of switching of each contact is suitable for a maximum of 720 operations per hour. The speed of the driving shaft rotation shouldn't be over 60 rpm. Features:- High durable standards Optimum performance Easy to install Counter Weight Limit Switches A metal structure offers the required stability to Counter Weight Limit Switches that job on heavy c...
Post a Comment
Read more

Solid State Relay AC & DC Input Circuit

Solid State Relays are semiconductor equivalents of the mechanical device relay and may be accustomed control electrical masses while not the utilization of moving parts. a normal electro-mechanical relay, SSR’s provide complete electrical isolation between their input and output contacts with its output acting as a conventional electrical switch in that it has very high, almost infinite resistance once nonconductive (open), and a really low resistance once conducting (closed). Solid State Relays can be designed to switch both AC or DC currents by using an SCR, TRIAC, or switching transistor output instead of the usual mechanical normally-open (NO) contacts. Solid State Relay DC Input Circuit When utilizing mechanical contacts, switches, push-catches, other hand-off contacts, and so forth, as the initiating signal, the supply voltage utilized can be equivalent to the SSR's base information voltage esteem, though when utilizing strong state gadgets, for example, trans...
Post a Comment
Read more

What is an Op-Amp? Operation, parameters & characteristics

What is an Op-Amp? Operational amplifiers are linear devices that have all the properties required for nearly ideal DC amplification and are therefore used extensively in signal conditioning, filtering or to perform mathematical operations such as add, subtract, integration and differentiation. An Operational Amplifier, or op-amp for short, is on a very basic level a voltage intensifying gadget intended to be utilized with outside criticism segments, for example, resistors and capacitors between its yield and information terminals. These input parts decide the subsequent capacity or "activity" of the enhancer and by ideals of the diverse criticism setups whether resistive, capacitive or both, the intensifier can play out a wide range of tasks, offering ascend to its name of "Operational Amplifier". Op-amp operation The amplifier’s differential inputs contains a non-inverting input with voltage (V+) and an inverting input with voltage (V−). Ideally, an op...
Post a Comment
Read more